OK, let's work through this together. We're starting with 454 and we're going to multiply it by 57, which means we add 454 to itself 57 times.
Step 1: 0 + 454 = 454
Step 2: 454 + 454 = 908
Step 3: 908 + 454 = 1362
Step 4: 1362 + 454 = 1816
Step 5: 1816 + 454 = 2270
Step 6: 2270 + 454 = 2724
Step 7: 2724 + 454 = 3178
Step 8: 3178 + 454 = 3632
Step 9: 3632 + 454 = 4086
Step 10: 4086 + 454 = 4540
Step 11: 4540 + 454 = 4994
Step 12: 4994 + 454 = 5448
Step 13: 5448 + 454 = 5902
Step 14: 5902 + 454 = 6356
Step 15: 6356 + 454 = 6810
Step 16: 6810 + 454 = 7264
Step 17: 7264 + 454 = 7718
Step 18: 7718 + 454 = 8172
Step 19: 8172 + 454 = 8626
Step 20: 8626 + 454 = 9080
Step 21: 9080 + 454 = 9534
Step 22: 9534 + 454 = 9988
Step 23: 9988 + 454 = 10442
Step 24: 10442 + 454 = 10896
Step 25: 10896 + 454 = 11350
Step 26: 11350 + 454 = 11804
Step 27: 11804 + 454 = 12258
Step 28: 12258 + 454 = 12712
Step 29: 12712 + 454 = 13166
Step 30: 13166 + 454 = 13620
Step 31: 13620 + 454 = 14074
Step 32: 14074 + 454 = 14528
Step 33: 14528 + 454 = 14982
Step 34: 14982 + 454 = 15436
Step 35: 15436 + 454 = 15890
Step 36: 15890 + 454 = 16344
Step 37: 16344 + 454 = 16798
Step 38: 16798 + 454 = 17252
Step 39: 17252 + 454 = 17706
Step 40: 17706 + 454 = 18160
Step 41: 18160 + 454 = 18614
Step 42: 18614 + 454 = 19068
Step 43: 19068 + 454 = 19522
Step 44: 19522 + 454 = 19976
Step 45: 19976 + 454 = 20430
Step 46: 20430 + 454 = 20884
Step 47: 20884 + 454 = 21338
Step 48: 21338 + 454 = 21792
Step 49: 21792 + 454 = 22246
Step 50: 22246 + 454 = 22700
Step 51: 22700 + 454 = 23154
Step 52: 23154 + 454 = 23608
Step 53: 23608 + 454 = 24062
Step 54: 24062 + 454 = 24516
Step 55: 24516 + 454 = 24970
Step 56: 24970 + 454 = 25424
Step 57: 25424 + 454 = 25878

So, 454*57 = 25878